FilterBehavior.ActualFilterCriteriaChanged Event
Occurs when the filter criteria is changed.
Namespace: DevExpress.Xpf.Core.FilteringUI
Assembly: DevExpress.Xpf.Grid.v24.1.dll
NuGet Package: DevExpress.Wpf.Grid.Core
Declaration
Event Data
The ActualFilterCriteriaChanged event's data class is EventArgs.
Remarks
The following code sample shows how to use the FilterBehavior to make the Filter Elements filter the ViewModel’s data.
<dxa:AccordionControl>
<dxmvvm:Interaction.Behaviors>
<dxfui:FilterBehavior x:Name="filterBehavior" ActualFilterCriteriaChanged="filterBehavior_ActualFilterCriteriaChanged">
<dxfui:FilterField FieldName="CategoryName">
<dxe:ComboBoxEditSettings ItemsSource="{Binding Categories}"/>
</dxfui:FilterField>
</dxfui:FilterBehavior>
</dxmvvm:Interaction.Behaviors>
<dxfui:CheckedListFilterElement FieldName="CategoryName" />
<dxfui:CheckBoxFilterElement FieldName="Discontinued" />
<!-- -->
</dxa:AccordionControl>
<!-- -->
<dxe:ListBoxEdit Name="listBoxEdit" ItemsSource="{Binding Products}">
<!-- -->
</dxe:ListBoxEdit>
void filterBehavior_ActualFilterCriteriaChanged(object sender, EventArgs e) {
var viewModel = (FilterBehaviorServerDataViewModel)DataContext;
if(ReferenceEquals(filterBehavior.ActualFilterCriteria, null)) {
viewModel.SetFilter(null);
} else {
var converter = new GridFilterCriteriaToExpressionConverter<ProductInfo>();
var expression = converter.Convert(filterBehavior.ActualFilterCriteria);
viewModel.SetFilter(expression);
}
}
See Also